Short answer: Fragrance dosage varies widely by product: in perfume around 15–20% of the product can be fragrance, while in shampoos and creams it is usually below 1%. The ranges below are common starting points in the industry; the exact level is set by trial, based on the fragrance, your base and the limits in the IFRA Standards.
Common starting ranges by product type
| Product | Common fragrance level (by weight) |
|---|---|
| Eau de Parfum (EdP) | 15–20% |
| Eau de Toilette (EdT) | 5–15% |
| Eau de Cologne | 2–5% |
| Body mist | 1–3% |
| Bar soap | 1–3% |
| Liquid soap, shower gel | 0.5–1.5% |
| Shampoo | 0.3–1% |
| Cream, lotion | 0.1–0.5% |
| Liquid laundry detergent | 0.2–1% |
| Fabric softener | 0.5–1.5% |
| Surface cleaner | 0.1–0.5% |
| Candle | 6–10% |
| Reed diffuser | 15–30% |
These values are general guidance. Some fragrance ingredients are restricted by product category in the IFRA Standards; ask your supplier for the fragrance's IFRA conformity information and do not exceed the stated maximum level.
How do you find the right level?
- Start at the low end of the range, e.g. 0.3% for shampoo.
- Prepare a three-level trial, e.g. 0.3%, 0.5% and 0.8%.
- Let it rest. Allow samples a few days for the scent to settle into the base; candles may need longer.
- Evaluate in real use. Judge shampoo while washing, candles while burning and detergent on dry laundry.
- Check stability. Watch for discolouration, cloudiness and texture changes over a few weeks.
Risks of using too much fragrance
- Cost: fragrance is usually one of the most expensive ingredients in a formula.
- Skin tolerance: high levels in leave-on products can increase the risk of irritation.
- Product structure: excess fragrance can thin shampoos and gels or break emulsions.
- Candle soot: more fragrance than the wax can hold can cause smoking, soot and sweating.
Conclusion
The table is a good starting point, but the final word comes from a trial in your own base. Share your product type and target intensity and we can send a suitable fragrance with a recommended starting level and a sample.